Research on Network Security Situation Awareness Method Based on Likelihood BP

Aiming at the problem of large error between the perception result and the actual value in the process of network security situation awareness, a network security situation awareness method based on likelihood BP is proposed. Firstly, the network security status index is selected to calculate the intrusion threat value; Secondly, BP network is optimized by maximum likelihood estimation; Then, the situation factors are graded and quantified to determine the primary and secondary situation factors and high-level security situation, so as to realize the awareness of network security situation; Finally, experimental verification is carried out. The experimental results show that this method can effectively improve the effect of network security situational awareness, which is closer to the actual value, and can effectively improve network security.